Infiniverse is an API that allows other mods to add and remove dimensions during server runtime. It provides no features or content on its own.
Infiniverse is primarily a server mod and not required on clients (it is also compatible with vanilla clients). However, if the Infiniverse mod is present on your client, any new/removed dimensions will be immediately available in command suggestions for commands that take dimensions as arguments (such as /execute in). If Infiniverse is not present on your client, you will need to log out of the server and log in for these changes to be visible in command suggestions.
Documentation for developers can be found in the project readme on github via the "sources" link above.
Project members
Commoble
Developer